Mark Sanchez aiming to learn Cowboys' offense, help Dak Prescott

No plan for Sanchez to take a snap for Cowboys (1:11)

Field Yates explains how the Cowboys only plan on using Mark Sanchez in case of emergency, as well as what it means for Dallas that they did not place Tony Romo on IR to start the season. (1:11)

FRISCO, Texas -- Mark Sanchez is not wasting any time getting accustomed to the Dallas Cowboys' offense.

Officially signed on Sunday, Sanchez was on the practice field Monday and he is expected to be Dak Prescott’s backup in the season opener against the New York Giants.

In between he has to learn the Cowboys’ offense.

“Give me a few minutes,” Sanchez said. “I got a long way to go.”

The Cowboys went through something similar last year, teaching Matt Cassel the offense on the run after he was acquired in Week 3 in a trade with the Buffalo Bills. The Cowboys are Sanchez’s fourth team, having played for the New York Jets, Philadelphia Eagles and spent time this summer with the Denver Broncos.

“Anywhere you go there's a ton of concepts that you know, a lot of things you've seen before or heard other people talk about,” Sanchez said. “Protections wise, everybody's got just about the same protections, but then it's learning a different dialect of a language or a whole new language completely, that's really where the learning curve comes in, speaking the language back to the receivers, the tight ends, the running backs, to everybody on offense, so that's what takes so much time.”

Two weeks ago he was in contention to be the Broncos’ starter but they chose to go with Trevor Siemian as their top quarterback with rookie Paxton Lynch as the backup.

“Hey, look, like I said, things didn’t go the way you planned,” Sanchez said. “I thought there was a great opportunity there, and unfortunately it didn’t work out. ... Without that happening, I wouldn’t get a chance here, so this could be the right spot for me and a better place for me. You just continue to work hard and attack it.”

His goal now is to learn the offense and help Prescott as much as possible. Prescott will become the fourth rookie quarterback in team history to start a season opener, joining Roger Staubach (1969), Troy Aikman (1989) and Quincy Carter (2001).

“You've got to help the guy on the field. Right now that's Dak, and you do everything you can to help him,” Sanchez said. “Anything that I know, that I can help him with, I've played against the NFC East before, I've played against a lot of the teams we're going to see, I've been in those stadiums, any kind of knowledge I can impart on him without bombarding the guy.”